Kolos no big deal, same for Kinjo, Emeth is ridiculous, Uranus is a pain but not that bad. The real reason you dont have to wory is most decks running these guys arent top 50 even. The ones you hate seeing are the Zatmans the Jackies and the Ambres. They can be in top decks and you see them all the time. Hugo is another guy you dont like to see because you see him too often. Hopefully with these new bans the Hugo/Montana or Uppers and the Ambre+ decks will Vanish away in losing.

Kinjo is not a problem, although this one time I underestemated this guy with a Lost Hog, and he 1HKOed me...El Gringo isn't a huge threat either.Kolos is a monster, but I can handle him.
Emeth is also a monster, he's practically invincible. (Unless facing GHEIST or Roots, obviously....)Uranus? Did you forget about GraksmxxT? The two are just super annoying.

See everyone fears those big boys, but they aren't really that bad if you understand how to work against them. Ambre doesn't even have to make you cringe . But, that being said, there are two cards that I wish just didn't exist... and they are Nellie and Jakie. This is becease of the role they play in the DT (I'm mainly refering to T2 play). If your trying to rank high then naturally five stars are out of the question BP wise. Uppers are good in DT because atk manip is really great for the fast paced battles. Nellie and Jakie's given star level is questionable in my opinion. They are almost too good for 4* but were they 5* they'd be usable but kind of meteocre. (More points for beating higher level cards which is easy for them to do)

Being so powerfull and so low starred makes it too easy for Uppers players to beat you. Not to mention, they often appear in your hand either together or separate. It ends up being kind of unfair.

None of these cards will give many points to their owner:
-Elo bans reduce 2 points per each char
-5* get less points than lower stars
-Uranus and other reducers make the opp have to think, as so taking time and reducing ur scoring time

so ppl only use them as they are not rly there for tournament (only DT winning cards i ever seen on these categories been jackie and tht other Uppers)